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Weather & Climate in Mesa, WA

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Mesa experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 33°F in January while summers reach 72°F in July. The area gets 279 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 8.8 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 28 / among the cleanest air in the country. The city sits at an elevation of 740 feet.

Temperature

33°F Jan (0°C) 72°F Jul (22°C)
Annual Average51.7°F
4% below US avg
January Average33°F (0°C)
July Average72°F (22°C)
Sunny Days279 days/yr

Geography

Elevation740 ft (226 m)
Area0.6 sq mi (1.7 km²)
Population Density380/sq mi
Coordinates46.5735°N, 119.0013°W
TimezoneAmerica/Los_Angeles
CountyBenton County County
Nearest AirportTri-Cities (PSC)
22 miles away

Precipitation & Snow

Annual Rainfall 8.8"
77% below US avg
Wettest Month (Dec) 1.18"
Driest Month (Jul) 0.24"

Air Quality

AQI Median28.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Moderate
Risk Score87.1 / 100
Social Vulnerability30.3 / 100
Community Resilience58.6 / 100

Hazard Breakdown

Tornado Very Low
Earthquake Relatively Moderate
Wildfire Relatively Moderate
Flood Relatively Moderate
Hail Relatively Low
Strong Wind Relatively Low
Heat Wave Relatively Moderate
Winter Weather Relatively High
Lightning Relatively Moderate
Ice Storm Relatively High
Drought Very Low
Cold Wave Relatively Moderate
Landslide Relatively Low
Volcano Very Low
Avalanche Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

208 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.3.

Nov 28, 1991 7 km S of Walla Walla East, Washington M4.3 84 km 9 km
Jun 17, 2010 30 km S of White Swan, Washington M4.2 143 km 3 km
Jul 14, 1992 6 km S of Walla Walla East, Washington M4.1 84 km 11 km
Oct 9, 1998 20 km S of White Swan, Washington M4.0 137 km 2 km
Nov 18, 1997 20 km NW of Bickleton, Washington M3.9 123 km 15 km
Aug 7, 1992 8 km WSW of Irrigon, Oregon M3.9 91 km 0 km
Sep 4, 2011 14 km N of Richland, Washington M3.7 27 km 2 km
Jul 4, 1997 8 km NNE of Waterville, Washington M3.7 149 km 7 km
Jan 1, 1997 14 km NNE of Selah, Washington M3.7 113 km 18 km
May 18, 2008 11 km SSW of Benton City, Washington M3.7 62 km 20 km
Jan 23, 2015 3 km N of Cayuse, Oregon M3.5 102 km 20 km
Oct 26, 1992 12 km N of Naches, Washington M3.5 134 km -1 km
Jun 29, 2005 0 km SE of Gleed, Washington M3.5 123 km 9 km
Oct 12, 2017 25 km NW of Bickleton, Washington M3.4 127 km 13 km
Nov 6, 1997 22 km SE of Desert Aire, Washington M3.4 54 km 22 km
Oct 15, 2011 13 km N of Richland, Washington M3.4 27 km 1 km
Jan 13, 1994 11 km SW of Lind, Washington M3.4 42 km 0 km
Jun 17, 2004 11 km SSE of Washtucna, Washington M3.4 59 km 17 km
Jul 6, 1991 7 km SE of Kittitas, Washington M3.4 110 km 3 km
Dec 22, 1990 9 km NW of Mattawa, Washington M3.4 80 km 3 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

30 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2.

Date Rating Distance Path Fatalities
Mar 14, 1966 EF2 92 km 1.0 mi 0
Jun 26, 1958 EF2 56 km 0.3 mi 0
May 19, 2006 EF1 98 km 0.1 mi 0
Jan 16, 2000 EF1 82 km 1.0 mi 0
Aug 10, 1985 EF1 45 km 1.0 mi 0
Apr 23, 1983 EF1 5 km 3.0 mi 0
Jul 1, 1978 EF1 22 km 2.3 mi 0
May 1, 2024 EF0 97 km 0.4 mi 0
Mar 5, 2024 EF0 90 km 0.2 mi 0
Jun 27, 2023 EF0 86 km 0.1 mi 0
May 26, 2023 EF0 74 km 0.4 mi 0
Mar 31, 2020 EF0 35 km 0.1 mi 0
May 22, 2016 EF0 44 km 0.2 mi 0
Aug 13, 2014 EF0 67 km 0.3 mi 0
May 19, 2010 EF0 69 km 0.2 mi 0
Jun 7, 2004 EF0 83 km 0.5 mi 0
May 23, 2004 EF0 94 km 0.1 mi 0
May 11, 2003 EF0 51 km 0.1 mi 0
Jul 13, 2002 EF0 98 km 0.2 mi 0
May 15, 2000 EF0 97 km 0.2 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Tsunami History

1 tsunami recorded within 500 km. Highest wave on record: 19.8 m (65 ft).

Year Location Cause Max Wave Deaths Distance
1949 COLUMBIA RIVER VALLEY, WA Meteorological 19.8 m — 147 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Adams (195 km).

Name Type Elevation Last Eruption Distance
Adams Stratovolcano 3,742 m (12,277 ft) 950 195 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: RANGE 12 (167,604 acres, 2016).

Year Name Acres Burned Distance
2016 RANGE 12 167,604 67 km
2000 24 COMMAND 162,300 47 km
1984 HANFORD 122,914 46 km
2007 WAUTOMA 77,956 54 km
1996 COLD CREEK 72,859 81 km
2018 BOYLSTON 66,292 90 km
2009 DRY CREEK COMPLEX 49,843 74 km
2019 COLD CREEK 43,756 51 km
2003 UMTANUM RIDGE 34,351 82 km
2017 SILVER DOLLAR 30,789 59 km
2022 VANTAGE HIGHWAY 29,299 96 km
2017 400 27,218 77 km
2020 TAYLOR POND 22,591 87 km
2018 L RD SW 22,101 51 km
1996 UNNAMED 21,130 63 km
2005 WALKER CANYON 20,764 37 km
2007 OVERLOOK 20,363 32 km
2010 EUREKA 19,811 38 km
2019 243 COMMAND 18,876 68 km
2016 BLACK ROCK ROAD 17,398 82 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 33°F (0°C) 0.9 in
February 37°F (3°C) 0.8 in
March 45°F (7°C) 0.8 in
April 52°F (11°C) 0.6 in
May 59°F (15°C) 0.6 in
June 66°F (19°C) 0.5 in
July 72°F (22°C) 0.2 in Warmest, Driest
August 71°F (22°C) 0.4 in
September 62°F (17°C) 0.4 in
October 52°F (11°C) 0.6 in
November 40°F (5°C) 1.1 in
December 32°F (-0°C) 1.2 in Coldest, Wettest

Mesa has a seasonal temperature swing of 41°F / from 32°F in December to 72°F in July. Total annual precipitation is 7.8 inches, with December being the wettest month (1.2") and July the driest (0.2").

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